They both require balance, grace, agility, and stamina. You can see this because in ballet you must have stamina to continuously move and no complicated tricks. In football you have to run up and down the Felix requiring a great amount of stamina.
OSHA (one part of a Personal Fall Arrest System) requires workers to wear a full-body harness, when they are working on a suspended scaffold more than 10 feet above the working surface, or when they are working in bucket truck or aerial lift.
